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[Server][Feature][needs-docs] WMTS tile matrices configuration

In QGIS Server 3.4, the WMTS API has been added in which the tile matrices are calculated except fro EPSG:3857 and EPSG:4326.

This commit adds the capability to select the tile matrices to use with the project and to configure the top-left corner and the last level of the tile matrix. In the case of EPSG:3857 and EPSG:4326, the user can only choose the last level of the tile matrices.

Funded by Ifremer.
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rldhont committed Jan 17, 2019
1 parent 681707b commit 81aa14392385abdf9d37898a296112af9523cf39
@@ -69,6 +69,7 @@
#include <QHeaderView> // Qt 4.4
#include <QMessageBox>
#include <QDesktopServices>
#include <QAbstractListModel>

const char *QgsProjectProperties::GEO_NONE_DESC = QT_TRANSLATE_NOOP( "QgsOptions", "None / Planimetric" );

@@ -686,6 +687,40 @@ QgsProjectProperties::QgsProjectProperties( QgsMapCanvas *mapCanvas, QWidget *pa
}
connect( twWmtsLayers, &QTreeWidget::itemChanged, this, &QgsProjectProperties::twWmtsItemChanged );

for ( int i = 0; i < mWMSList->count(); i++ )
{
QString crsStr = mWMSList->item( i )->text();
addWmtsGrid( crsStr );
}
connect( mWMSList->model(), &QAbstractListModel::rowsInserted, this, &QgsProjectProperties::lwWmsRowsInserted );
connect( mWMSList->model(), &QAbstractListModel::rowsRemoved, this, &QgsProjectProperties::lwWmsRowsRemoved );
connect( twWmtsGrids, &QTreeWidget::itemDoubleClicked, this, &QgsProjectProperties::twWmtsGridItemDoubleClicked );
connect( twWmtsGrids, &QTreeWidget::itemChanged, this, &QgsProjectProperties::twWmtsGridItemChanged );
const QStringList wmtsGridList = QgsProject::instance()->readListEntry( QStringLiteral( "WMTSGrids" ), QStringLiteral( "CRS" ) );
if ( !wmtsGridList.isEmpty() )
{
const QStringList wmtsGridConfigList = QgsProject::instance()->readListEntry( QStringLiteral( "WMTSGrids" ), QStringLiteral( "Config" ) );
QMap<QString, QStringList> wmtsGridConfigs;
for ( const QString &c : wmtsGridConfigList )
{
QStringList config = c.split( ',' );
wmtsGridConfigs[config[0]] = config;
}
for ( QTreeWidgetItem *item : twWmtsGrids->findItems( QString(), Qt::MatchContains | Qt::MatchRecursive, 1 ) )
{
QString crsStr = item->data( 0, Qt::UserRole ).toString();
if ( !wmtsGridList.contains( crsStr ) )
continue;

item->setCheckState( 1, Qt::Checked );
QStringList config = wmtsGridConfigs[crsStr];
item->setData( 2, Qt::DisplayRole, QVariant( config[1] ).toDouble() );
item->setData( 3, Qt::DisplayRole, QVariant( config[2] ).toDouble() );
item->setData( 4, Qt::DisplayRole, QVariant( config[3] ).toDouble() );
item->setData( 5, Qt::DisplayRole, QVariant( config[4] ).toInt() );
}
}

mWFSUrlLineEdit->setText( QgsProject::instance()->readEntry( QStringLiteral( "WFSUrl" ), QStringLiteral( "/" ), QString() ) );
QStringList wfsLayerIdList = QgsProject::instance()->readListEntry( QStringLiteral( "WFSLayers" ), QStringLiteral( "/" ) );
QStringList wfstUpdateLayerIdList = QgsProject::instance()->readListEntry( QStringLiteral( "WFSTLayers" ), QStringLiteral( "Update" ) );
@@ -1321,6 +1356,18 @@ void QgsProjectProperties::apply()
QgsProject::instance()->writeEntry( QStringLiteral( "WMTSPngLayers" ), QStringLiteral( "Layer" ), wmtsPngLayerList );
QgsProject::instance()->writeEntry( QStringLiteral( "WMTSJpegLayers" ), QStringLiteral( "Layer" ), wmtsJpegLayerList );

QStringList wmtsGridList;
QStringList wmtsGridConfigList;
for ( const QTreeWidgetItem *item : twWmtsGrids->findItems( QString(), Qt::MatchContains | Qt::MatchRecursive, 1 ) )
{
if ( !item->checkState( 1 ) )
continue;
wmtsGridList << item->data( 0, Qt::UserRole ).toString();
wmtsGridConfigList << QStringLiteral( "%1,%2,%3,%4,%5" ).arg( item->data( 0, Qt::UserRole ).toString(), item->data( 2, Qt::DisplayRole ).toString(), item->data( 3, Qt::DisplayRole ).toString(), item->data( 4, Qt::DisplayRole ).toString(), item->data( 5, Qt::DisplayRole ).toString() );
}
QgsProject::instance()->writeEntry( QStringLiteral( "WMTSGrids" ), QStringLiteral( "CRS" ), wmtsGridList );
QgsProject::instance()->writeEntry( QStringLiteral( "WMTSGrids" ), QStringLiteral( "Config" ), wmtsGridConfigList );

QgsProject::instance()->writeEntry( QStringLiteral( "WFSUrl" ), QStringLiteral( "/" ), mWFSUrlLineEdit->text() );
QStringList wfsLayerList;
QStringList wfstUpdateLayerList;
@@ -1414,6 +1461,71 @@ void QgsProjectProperties::showProjectionsTab()
mOptionsListWidget->setCurrentRow( 2 );
}

void QgsProjectProperties::lwWmsRowsInserted( const QModelIndex &parent, int first, int last )
{
Q_UNUSED( parent );
for ( int i = first; i <= last; i++ )
{
QString crsStr = mWMSList->item( i )->text();
addWmtsGrid( crsStr );
}
twWmtsGrids->header()->resizeSections( QHeaderView::ResizeToContents );
}

void QgsProjectProperties::lwWmsRowsRemoved( const QModelIndex &parent, int first, int last )
{
Q_UNUSED( parent );
Q_UNUSED( first );
Q_UNUSED( last );
QStringList crslist;
for ( int i = 0; i < mWMSList->count(); i++ )
{
crslist << mWMSList->item( i )->text();
}
for ( const QTreeWidgetItem *item : twWmtsGrids->findItems( QString(), Qt::MatchContains | Qt::MatchRecursive, 1 ) )
{
QString crsStr = item->data( 0, Qt::UserRole ).toString();
if ( crslist.contains( crsStr ) )
continue;
delete item;
}
}

void QgsProjectProperties::twWmtsGridItemDoubleClicked( QTreeWidgetItem *item, int column )
{
Qt::ItemFlags flags = item->flags();
if ( column == 0 || column == 6 )
{
item->setFlags( flags & ( ~Qt::ItemIsEditable ) );
}
else
{
QString crsStr = item->text( 0 );
if ( crsStr == QStringLiteral( "EPSG:3857" ) && column != 5 )
{
item->setFlags( flags & ( ~Qt::ItemIsEditable ) );
}
else if ( crsStr == QStringLiteral( "EPSG:4326" ) && column != 5 )
{
item->setFlags( flags & ( ~Qt::ItemIsEditable ) );
}
else
{
item->setFlags( flags | Qt::ItemIsEditable );
}
}
}

void QgsProjectProperties::twWmtsGridItemChanged( QTreeWidgetItem *item, int column )
{
if ( column == 4 || column == 5 )
{
double maxScale = item->data( 4, Qt::DisplayRole ).toFloat();
int lastLevel = item->data( 5, Qt::DisplayRole ).toInt();
item->setData( 6, Qt::DisplayRole, ( maxScale / std::pow( 2, lastLevel ) ) );
}
}

void QgsProjectProperties::twWmtsItemChanged( QTreeWidgetItem *item, int column )
{
if ( column == 1 && !item->checkState( 1 ) )
@@ -2079,6 +2191,93 @@ void QgsProjectProperties::populateWmtsTree( const QgsLayerTreeGroup *treeGroup,
}
}

void QgsProjectProperties::addWmtsGrid( const QString &crsStr )
{
QgsTreeWidgetItem *gridItem = new QgsTreeWidgetItem( QStringList() << crsStr );
gridItem->setFlags( gridItem->flags() | Qt::ItemIsUserCheckable | Qt::ItemIsSelectable | Qt::ItemIsEditable );
gridItem->setCheckState( 1, Qt::Unchecked );
gridItem->setData( 0, Qt::UserRole, crsStr );

// Define or calculate top, left, max. scale
int lastLevel = 18;
double scaleDenominator = 0.0;
if ( crsStr == QStringLiteral( "EPSG:3857" ) )
{
gridItem->setData( 2, Qt::DisplayRole, 20037508.3427892480 );
gridItem->setData( 3, Qt::DisplayRole, -20037508.3427892480 );
scaleDenominator = 559082264.0287179;
}
else if ( crsStr == QStringLiteral( "EPSG:4326" ) )
{
gridItem->setData( 2, Qt::DisplayRole, 90.0 );
gridItem->setData( 3, Qt::DisplayRole, -180.0 );
scaleDenominator = 279541132.0143588675418869;
}
else
{
// calculate top, left and scale based on CRS bounds
QgsCoordinateReferenceSystem crs = QgsCoordinateReferenceSystem::fromOgcWmsCrs( crsStr );
QgsCoordinateTransform crsTransform( QgsCoordinateReferenceSystem::fromOgcWmsCrs( GEO_EPSG_CRS_AUTHID ), crs, QgsProject::instance() );
try
{
// firstly transform CRS bounds expressed in WGS84 to CRS
QgsRectangle extent = crsTransform.transformBoundingBox( crs.bounds() );
// Constant
int tileSize = 256;
double POINTS_TO_M = 2.83464567 / 10000;
// Calculate scale denominator
int colRes = ( extent.xMaximum() - extent.xMinimum() ) / tileSize;
int rowRes = ( extent.yMaximum() - extent.yMinimum() ) / tileSize;
if ( colRes > rowRes )
{
scaleDenominator = std::ceil( colRes * QgsUnitTypes::fromUnitToUnitFactor( crs.mapUnits(), QgsUnitTypes::DistanceMeters ) / POINTS_TO_M );
}
else
{
scaleDenominator = std::ceil( rowRes * QgsUnitTypes::fromUnitToUnitFactor( crs.mapUnits(), QgsUnitTypes::DistanceMeters ) / POINTS_TO_M );
}
// Calculate resolution based on scale denominator
double res = POINTS_TO_M * scaleDenominator / QgsUnitTypes::fromUnitToUnitFactor( crs.mapUnits(), QgsUnitTypes::DistanceMeters );
// Get numbers of column and row for the resolution
int col = std::ceil( ( extent.xMaximum() - extent.xMinimum() ) / ( tileSize * res ) );
int row = std::ceil( ( extent.yMaximum() - extent.yMinimum() ) / ( tileSize * res ) );
// Update resolution and scale denominator to get 1 tile at this scale
if ( col > 1 || row > 1 )
{
// Update scale
if ( col > row )
{
res = col * res;
scaleDenominator = col * scaleDenominator;
}
else
{
res = row * res;
scaleDenominator = row * scaleDenominator;
}
// set col and row to 1 for the square
col = 1;
row = 1;
}
double top = ( extent.yMinimum() + ( extent.yMaximum() - extent.yMinimum() ) / 2.0 ) + ( row / 2.0 ) * ( tileSize * res );
double left = ( extent.xMinimum() + ( extent.xMaximum() - extent.xMinimum() ) / 2.0 ) - ( col / 2.0 ) * ( tileSize * res );

gridItem->setData( 2, Qt::DisplayRole, top );
gridItem->setData( 3, Qt::DisplayRole, left );
}
catch ( QgsCsException &cse )
{
Q_UNUSED( cse );
}
}
gridItem->setData( 4, Qt::DisplayRole, scaleDenominator );
gridItem->setData( 5, Qt::DisplayRole, lastLevel );
gridItem->setData( 6, Qt::DisplayRole, ( scaleDenominator / std::pow( 2, lastLevel ) ) );
twWmtsGrids->blockSignals( true );
twWmtsGrids->addTopLevelItem( gridItem );
twWmtsGrids->blockSignals( false );
}

void QgsProjectProperties::checkOWS( QgsLayerTreeGroup *treeGroup, QStringList &owsNames, QStringList &encodingMessages )
{
QList< QgsLayerTreeNode * > treeGroupChildren = treeGroup->children();
@@ -99,9 +99,23 @@ class APP_EXPORT QgsProjectProperties : public QgsOptionsDialogBase, private Ui:
* Set WMS default extent to current canvas extent
*/
void pbnWMSExtCanvas_clicked();

/**
*
*/
void pbnWMSAddSRS_clicked();
void pbnWMSRemoveSRS_clicked();
void pbnWMSSetUsedSRS_clicked();

/**
* Slots to link WMS CRS list to WMTS Grids tree view
*/
void lwWmsRowsInserted( const QModelIndex &parent, int first, int last );
void lwWmsRowsRemoved( const QModelIndex &parent, int first, int last );

/**
*
*/
void mAddWMSPrintLayoutButton_clicked();
void mRemoveWMSPrintLayoutButton_clicked();
void mAddLayerRestrictionButton_clicked();
@@ -139,6 +153,8 @@ class APP_EXPORT QgsProjectProperties : public QgsOptionsDialogBase, private Ui:
* Slot to link WMTS checkboxes in tree widget
*/
void twWmtsItemChanged( QTreeWidgetItem *item, int column );
void twWmtsGridItemDoubleClicked( QTreeWidgetItem *item, int column );
void twWmtsGridItemChanged( QTreeWidgetItem *item, int column );

/**
* Slot to link WFS checkboxes
@@ -223,6 +239,8 @@ class APP_EXPORT QgsProjectProperties : public QgsOptionsDialogBase, private Ui:

//! populate WMTS tree
void populateWmtsTree( const QgsLayerTreeGroup *treeGroup, QgsTreeWidgetItem *treeItem );
//! add WMTS Grid definition based on CRS
void addWmtsGrid( const QString &crsStr );
//! Check OWS configuration
void checkOWS( QgsLayerTreeGroup *treeGroup, QStringList &owsNames, QStringList &encodingMessages );

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